Intermittent-grip device



Feb. 25, 1930. A s 1,748,887

- INTERMITTENT GRIP DEVICE Original Filed June 1; 1927 INVENTOR ATTORNEY Patented Feb. "25,1930

EPA-TENT oFrIc ABELABDO LINARES, 0F MABACAIBO, VENEZUELA INT nMIzr'rENr-eiur DEVICE Original application filed J'une 1, 1927, Serial No. 195,810, Divided and this application filed May 1,1928.

' r Y Serial No. 274,283.' 1 j invention relates to'intermittent grip devices, and constitutes a'division of my'original application Serial No. 195,810, filed June 1513, 192.7, for screw adjustable mechanisms. 5 From one aspect, a feature'of the invention consists in the provision, in combination, of a rotatable element having aratchet wheel thereon, and a detachably mounted handle member having a cooperating pawl element, said member being demountable from the ratchet wheel for convenience in storage or shipment and being reversible thereon for effecting reverse directions of rotation. From a related view point, another feature of the invention consists in a section'alarcw ate handled head, mounting a pawl and having provision forenlargement and reduction ofits enclosing area to embrace and hold or to release and separate from a ratchet wheel, including means for locking its sections in and releasing them from ratchet engaging position. i 7 I The construction provided, facilitates and greatly simplifies the ease with which the pawlrcarrying head may be. attached to'a-nd released from engagement with the ratchet wheel, and since, in accordance with themvention, the pawl member is detachable and is formed for 'reve'rsable connection to the ratchet wheel, it is evident that from this view point, afurther featureuof the inven-f tion resides in the" provision in combination with a ratchet member, of a demountable,

handled pawl-carrying member cooperating therewith and demountable from and reversable thereon to reverse the direction of rotation imparted to the ratchet member thereby. The structural features providing these and other advantages "are? described more fully in the following detailed specification which is to beread in" conjunction with the accompanying drawings formingpart thereof and in whichz Figure 1 is a view in side elevation of an cordance with the present invention and applied to .the threaded adjusting member of a vise structure. H H v 7 l iglru re 2 is longitudinal vertical section through the ratchet head and handled pawl tion, Serial No. 274,282,

head comprises a section S-Whi'chis intermittent grip device constructed in ac member taken on the line 22 of Figure 1.--

Figure 3 is a fragmentary vertical 'seC- tion of'the pawl-carrying handled member expanded and removed from the ratchet head.

Figure 4 is a transverse section through Y the locking ring and handlewith the parts in ratchet enclosing position, the section being taken on line 4-'-4 of' Figure 2. i

Figures 5, 6, 7 and 8 show in perspective the clamping nut, spring washer, pawl spring and pawlin their order of assembly.

"In the drawings, the invention is'shown in Figure 1 as applied to a vise structure, 1 representing the tubularshank of themovable jaw of such a structure with the threaded interior surface of which the rotatable threaded sleeve 2 engages to move the shank and its jaw. The sleeve is rotatably mounted on the fixed shank 3 which may be part of the fixed jaw of the vise structure. 'At its j outer end the jaw adjusting threaded sleeve 2 has rigidly connected therewith a ratchet wheel 4 having its periphery curvedsubstantially convexly transversely thereof and formed with a circumferentially spaced series of radial-sockets 5. The sleeve 2 is retained The vise structure described is cited il- 30 lu'strative of the application of the intermittent grip device of the present invention and forms no part thereof, but constitutes in part the subject matter of a cop'ending'applica- The means'associating with and providing an intermittent rotating grip on the ratchet wheel i c omprises a handle bar 7 and a head for embracing the ratchet wheel 4. Said with the handle bar anda cooperating'section 9 having a shortshank l0'a dapted to'fit in a laterally cut awayportion 11 (Figure 3) onthe adjacent end of the handle bar-7 and connected with the handle bar/7 by a j Y tranverse pivot element 12. A retaining ring; 18 is slidalole on the handle 7 to and from position to overlap the shank'lO and'fto'then retain the shank 1O completely in the cut way P s .11 1f the a dle 7 set the? the see n tions 8 and 9 will be retained on the ratchet wheel 4 and will partially encircle the ratchet.

wheel 4. The sections 8 and 9' are curved transversely to conform substantially to the transverse curvature of the peripheral portion of the ratchet wheel 4. The free endof the shank 10 and the adjacent wall of the cut away portion of the handle? are comple mentarily beveled (Figure 3) so as to proa v away portion 11 of the handle 7 The ad-- j acent or abutting ends of the sections 8 and 9 likewise are complementarily beveled so as to fit neatly and firmly against each other when the sections 8 and 9 are closed as shown in Figure 2. When the ring 13 has been slid along the handle 7 out of engagementwith the shank 10, the section 9 may swing away from the section 8 a distance sufficient to permit removal of the lever from the ratchet wheel 4 as shown in Figure 3. I

The section 9 of the head of the lever is formed with an outwardly extending tubular boss 14 having a head 15 at its outer end formed with the laterally extending flange 0r mar inal edge portion 16 and with a relatively small central opening 17 in axial alinement with a larger opening 18 in the section 9. An actuating pawl 19 extends slidably through the opening 18 and has a reduced rigid shank 20 which protrudes from the tubular boss 14 through the opening 17 in the head 15. The outer end portion of the shank 20 is threadedly engaged by an adjusting nut 21 having a laterally extending finger 22 formed with a bent endportion 23 in contact with the edge of the flange 16. A convexo-concave spring washer 24 having a notched edge is disposed on the shank 20 between the nut 21 and the head 15 ofther boss 26 and limits the inward movement of the pawl 19 in response to the actuation of a compression spring 25 that is coiled about the shank 20 within the confines of the tubular boss 14. The nut 21 can be tightened to ex-.

pand the spring washer 24 more or less and thereby to permit the pawl 19 to move a greater or less distance toward the center of the head of the lever to respondto the actuation of the spring 25. The extending inner end of the pawl 19 is beveled as indicated at 26 andis adapted to enter into one of the sockets 5 in the ratchet wheel 4 when the sections 8 and 9 are closed so that swinging of the lever in one direction about the axis of the shank of the jaw 1 will cause the screw 2 to turn in the same direction and swinging of the lever in the opposite direction about the axis of the shankwill not cause rotation of the screw 2 for the reason that the beveled face26 of the pawl 19 will contact with a side wallof the associated socket 5 and will ride out of such socket against the action of the spring 25 onto the periphery of the ratchet wheel 4. In tightening the jaws, the lever ill be arranged on the ratchet wheel 4 so that it will be effective to turn the screw 2 as required to move the jaw 1 inolosing direction and the lever then may be reversed on the ratchet wheel when it is desired to open the jaws. Some suitable means such as the cross pin shown in Figures 2 and 3 is preferably used to retain the locking ring 13 on the handle.

The specific structural form of the invention disclosed herein while representing a preferred form thereof is intended as illustrativeratherthan restrictive and 1nodification and structural changes adapting the device to different operating conditions is contemplated in consonance with the spirit of the invention and the scope of the appended claims.

WVhat I claim therefore,and desire to secure by'Letters Patent is 1. The combination with a ratchet wheel having a circumferentially extending series of sockets in its periphery of a ratchet wheel operating member comprising a handle having an integral arcuately curved head section at one end thereof, a second arcuately curved head section having its shank pivotally connected with said handle, said shank being adapted to enter a cut away portion of said handle, a latching ring slidable on said hane die to and from position to overlap said shank and then to maintain said head sections closed, said head sectlons belng adapted when closed to embrace said ratchet wheel,

one of said sections having a radial opening, and a tubular boss at the outer end of said radial opening, said tubular boss having a head at its outer end provided with an extending marginal edge portion, said I edge of the tubular-boss having an opening of restricted area in radial alinenient with said first named opening in the wall of said head section, a pawlslidable incsaid first named radial opening and having a shank slidable in the opening in the head of said tubular boss, a compression spring within said tubular boss, between the head of the tubular boss and the outer end of said pawl, an adjusting nut on the, outer end portion'of the shank of the pawl, and a spring washe'ribetween said adjusting nut and the head of said tubular boss, said adjusting nut having an outwardly extending finger formed witha bent end portion in contact with the outer edge of the head of said tubular boss.- 7 2. The combination With a ratchet wheel having a circumferentially extending series of sockets in its periphery of a ratchet wheel operating member'comprising a handle having an integral arcuately curved head secbeing adapted to enter a cut away portion of said handle, a latching ring slidable on said head at its outer end provided with an eX-,

tending marginal edge portion, said edge of the tubular boss having an opening of "restrlcted area 1n radlal alinement wlth said radial opening and having a shank slidable in the opening in the head of said tubular boss, a compression spring within said tubular boss, between the head of the tubular boss and the outer end of said pawl, an adjusting nut on the outer end portion of the shank of the pawl, and a spring washer between said adjusting nut and the head of said tubular boss, said adjusting nut having an outwardly extending finger formed with a bent end portion in contact with the outer edge of the head of said tubular boss,

1 said sections of the head of said ratchet operating member having side edge portions extending along the sides of the peripheral portion of the ratchet wheel when'said sec-' tions of the head of the operating member are disposed in embracmg relation to sald ratchet wheel.

of a bodily detachable sectional; arcuate wheel-embracing head, a springpressed pawl wheel-embracing head, a cooperating pawl housed therein, said headcomprising an arcuate section having a handle portion extending therefrom and slotted longitudinally and outwardly from its junction with said section, and a second arcuate section havingan arm extending therefrom andhoused in the slotted portion of said handle and pivoted intermediate of its ends therein, said arm being movable with its section on said pivot from a wheel embracing position within said slot, to an expanded position without said slot permitting bodily removal of the head from the ratchet wheel, and means for detachably locking said arm within said slot with bracing relation.

6; The combination with a ratchet wheel having a circumferentially spaced series of ratchet surfaces, of a wheel embracing head, a, cooperating spring pressed pawl housed therein, said head comprising one arcuate section having an integral operating handle extending therefrom and slotted at its junction with said section, and a second arcuate section having an arm extending therefrom and pivotally mounted in said handle slot for movement from a position wholly within said slot positioning its arcuate section for cooperation with said first section to embrace the ratchet wheel to a position without said slot permitting bodily withdrawal of the head from the ratchet wheel, and means on said handlemovableto and from a position holding said arm wholly within said slot. 7

, ABELARDO LINARES.

housed therein, said head comprising one arc- I uate section having a rigidly connected handle extension, and a second acuate section pivotally mounted at one end on said handle ex tension, and means for detachably locking said second sect-ion to saidhandle extension in cooperative wheel embracing relation to said firstarcuate section.

4'. The combination with a ratchet wheel having a circumferentially spaced series of ratchet surfaces, of'a bodily detachable handle wheel embracing head, a spring pressed pawl housed therein having a beveled ratchet engaging surface el'tl'ective. to rotate said ratchet Wheel in one direction, of movement,;

' and sliding over said ratchet'surfaces in the reverse direction of movement, said head comprising one arcuate section having a rigidly connected handle extension and a second arcuate extension pivotally mounted at one end on said handle extension, with means on said handle extension movable to and from a position detachably locking said second section to said handle extension in cooperative wheel-embracing relation to said first section.

5. The combination .with a ratchet wheel having a circumferentially spaced series of ratchet surfaces, of a bodily detachable said arcuate sections in contracted wheel em- 

